Metallized Ceramic Cylinders

Metallized ceramic chambers are a necessary piece of Vacuum Interrupters (famously known as VI) which are utilized for making Vacuum Circuit Breakers (VCB). VCBs are utilized in medium voltage switchgears and control circulation lines to regulate the voltage in power dispersion by capturing voltage floods.

CUMI is world no. 2 provider for High immaculateness Alumina Metallized Ceramic barrels. These metallised chambers from CUMI discover their application worldwide for Vacuum interrupters because of their great electrical protection properties.

CUMI has practical experience in Moly Manganese (Mo-Mn) metallization alongside nickel plating which empowers astounding Hermetic fixing (Leak tight joints) for these metallised fired chambers. The release tight joints help in keeping up the required vacuum level for proficient circular segment extinguishing in the interrupters.

High mechanical quality of Mo-Mn metallized layer additionally accommodates a more drawn out life to the Vacuum interrupters. The metallisation offers the creation property to artistic barrels which at that point can be effectively brazed with normal braze combinations for use in differentapplications.

In textile industry, the yarns are stretched for a specific length before being woven into cloth. Rough cloth needs more twist per inch. Thus it is necessary for the yarn to be of accurate thickness and minimum roughness. Failing to achieve this results in poor quality of finished products. Thus machines to measure such parameters had to be designed. Our customer is an emerging leader in the field of quality testing, on-line monitoring and services for the textile industry worldwide by providing a complete range of solutions like fiber tester, yarn tester etc. The yarn testing machines have a ceramic sensor plate that ensures the correct thickness and roughness of the yarn before stretching. The conventional sensor plates were costly and incompatible with the existing machines.

Optical sensors measure the parameters up to a great level of accuracy but involve a huge initial investment and with an annual turnover of about 80 crore, investing in this technology didn’t look feasible. We had the challenge of providing to the customer’s need according to their situations. Hence sensors with a design compatible to the existing machines were to be developed while keeping the cost for the customer as low as possible, which was a difficult task.

The metallized ceramic sensor plates measure the thickness and roughness up to a great level of accuracy The yarns are passed through the silver coated sensor plates, and a specific capacitance value is recorded. Fluctuations in this value signals the defected yarns (or the ones that don’t have the desired thickness). This product was designed by our engineers specifically for this customer, customising for his requirements by considering the specifications of the existing machine.

Zirconia location pins reduced the hard entry at projection level from 40% to ~3%. Zirconia locating pins ensure the dimensional accuracy and consistency for the assemblies for much longer duration as there is negligible wear visa-vis metal pins. Zirconia location pins exhibit useful service life which is ~40 times that of metal location pins. Thus there is a huge economic advantage due to less frequent pin replacements. Zirconia location pins can withstand both thermal and electrical shocks and exceptional strength of Zirconia reduces damages to parts and fixtures.

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